65816 Addressing mode: Wait for Interrupt -- h
(WAI)
(1 byte) (3 cycles)
+---------------+------------------+-----------------------+----------+
| Cycle | Address Bus | Data Bus |Read/Write|
+---------------+------------------+-----------------------+----------+
| 1 | PBR,PC | Op Code | R |
| (9) 2 | PBR,PC+1 | Internal Operation | R |
| 3 | PBR,PC+1 | Internal Operation | R |
| IRQ,NMI 1 | PBR,PC+1 | IRQ(BRK) | R |
+---------------+------------------+-----------------------+----------+
(9) Wait at cycle 2 for 2 cycles after /NMI or /IRQ active input.
See also: Abbreviations